Considering damping and complicated boundary conditions for the valve support movement, the dynamic equation of the valve vibration of engine is found.
建立发动机气门振动的运动微分方程,该模型桿端作支承运动,考虑阻尼和较复杂的边界条件。
Objective: To evaluate the therapeutic effect of external valve support (EVS) implantation in the treatment of primary deep venous insufficiency (PDVI).